Year 7 Interactive Maths - Second Edition

Perimeter of a Triangle

Recall that:

The perimeter is the distance around a closed plane figure.

P = a + b + c

where a, b and c are the side lengths of the triangle.

Example 11

Find the perimeter, P, of the triangle shown below.

Solution:

So, the perimeter is 28 cm.

Study Another Topic in Chapter 12: Length and Perimeter

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